Add biantin keyboard

biantin/flake.nix

@@ -0,0 +1,51 @@
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+
+    zmk-nix = {
+      url = "github:lilyinstarlight/zmk-nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs = { self, nixpkgs, zmk-nix }: let
+    forAllSystems = nixpkgs.lib.genAttrs (nixpkgs.lib.attrNames zmk-nix.packages);
+  in {
+    packages = forAllSystems (system: let pkgs = nixpkgs.legacyPackages.${system}; in rec {
+      default = firmware;
+
+      firmware = zmk-nix.legacyPackages.${system}.buildSplitKeyboard {
+        name = "firmware";
+
+        src = nixpkgs.lib.sourceFilesBySuffices self [ "Kconfig" ".board" ".cmake" ".conf" ".defconfig" ".dts" ".dtsi" ".json" ".keymap" ".overlay" ".shield" ".yml" "_defconfig" ];
+
+        board = "piantor_pro_bt_%PART%";
+        shield = "nice_view";
+
+        zephyrSnippets = [ "studio-rpc-usb-uart" ];
+        extraCmakeFlags = [ "-DCONFIG_ZMK_STUDIO=y" ];
+
+        zephyrDepsHash = "sha256-gsqiTDJLAihVyBXVFlgXwqRmlREcFJctKpl4tEWmVlY=";
+
+        meta = {
+          description = "ZMK firmware";
+          license = nixpkgs.lib.licenses.mit;
+          platforms = nixpkgs.lib.platforms.all;
+        };
+
+        nativeBuildInputs = [
+          pkgs.python3Packages.setuptools
+          pkgs.python3Packages.protobuf
+          pkgs.protobuf
+        ];
+      };
+
+      flash = zmk-nix.packages.${system}.flash.override { inherit firmware; };
+      update = zmk-nix.packages.${system}.update;
+    });
+
+    devShells = forAllSystems (system: {
+      default = zmk-nix.devShells.${system}.default;
+    });
+  };
+}